Bighank - you can always post your question at http://www.amsoil.com/techservices.aspx and see what they say, and post back here. They like to know if customers are interested in new applications.
As Tim has pointed out, for now Amsoil does not recommend their ATF as a replacement for Toyota WS. However, if you are looking for an aftermarket, full synthetic upgrade, Redline D6 was recently released and it is a replacement for Dexron VI, Mercon SP, Toyota WS, and Mercedes Benz NAG-2.
